Answer to Question #212414 in General Chemistry for xiu

Question #212414

Acetylsalicylic acid, HA is an active ingredient in aspirin, has Ka value of 3.0 x10-5 . In order to determine its chemical reactivity, 0.1 mole acetylsalicylic acid is dissolve in 1L of water.

a) Calculate the concentrations of all species in the acetylsalicylic acid solution [6 marks] b) Determine the pH of solution [1 mark]

c) If 100 mL of acetylsalicylic acid sample is titrated with 100 mL of 0.1 M NaOH, what is the pH of this mixture at equivalence point? 


1
Expert's answer
2021-07-01T06:50:36-0400



C9H8O4 + NaOH → C9H7O4Na + H2O


Mole ratio = 1:1


PH = -log {H+}


PH = - log{0.1}=1



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